Oil Level Check Using The Pushbutton Shift Selector - PREVOST H3-45 2023 Operator's Manual

C-2 Allison Transmission Other Features
OIL LEVEL CHECK USING THE
PUSHBUTTON SHIFT SELECTOR
NOTE: You will
transmission operation
driving tips in the Allison 5th & 6th
Generation Operator's Manual 3000_ 4000
Series available on the Prevost Technical
Publications site.
The oil level sensor (OLS) is standard in your
transmission. With the OLS and Allison 5
generation shift selector, you can get a more
accurate electronic fluid level check than with a
dipstick.
Oil level codes are obtained as follows:
1. Park vehicle on a level surface, select «N» (neutral)
on the pushbutton shift selector and apply parking
brake.
2. Wait for at least 2 minutes to allow the oil to settle;
3. Press simultaneously the
(Downshift) arrow buttons once.
4. Oil level codes are displayed once the following
parameters are met:
The vehicle
l
approximately 2 minutes to allow the oil to
settle;
Engine at idle;
l
Oil at normal
l
between 104°F (40°C) and 220°F (104°C);
Transmission in «N» (Neutral);
l
Transmission output shaft stopped;
l
Oil level sensor present and working.
l
5. Correct fluid level is displayed as
shown.
find the complete
instructions and
th
& 6
(Upshift) and
has been stationary
operating temperature,
PA-1652 Operator's Manual H3-45 Coach
6. Low fluid level is displayed as
shown. The number indicates the
number of quarts of fluid the
transmission requires.
7. High fluid level condition with the
number of quarts in excess is
displayed as shown.
th
NOTE
Confirm a low fluid level condition by making a
manual fluid level check.
8. To exit the Oil Level Display Mode, press any range
button «R», «N» or «D» at any time.
NOTE
The OLS has a detection range of LO4 to HI 3
that can display on the selectors.
The actual oil level to add may be greater than
4 liters (4.22 quarts) if the transmission is more
than 4 liters (4.22 quarts) low from the full mark.
The actual fluid volume to drain may be more
than 3 liters (3.17 quarts) if the transmission is
overfilled by more than 3 liters (3.17 quarts).
for
If the fluid level check cannot be completed, an
Invalid for Display fault is reported. Refer to table
below to review the codes and conditions.
CODE
SETTLING OK
ENG RPM
LOW
ENG RPM
HIGH
MUST BE IN NEU
OIL TEMP
LOW
OIL TEMP
HIGH
VEH SPD TOO HI
CAUSE OF FAULT
CODE
Settling time too short
TOO
Engine speed (rpm) too low
TOO
Engine speed (rpm) too high
N (Neutral) must be selected
TOO Sump fluid temperature too
low
TOO Sump fluid temperature too
high
Output shaft speed